摘要:
Multi-scale turbulation features, including first turbulators (46, 48) on a cooling surface (44), and smaller turbulators (52, 54, 58, 62) on the first turbulators. The first turbulators may be formed between larger turbulators (50). The first turbulators may be alternating ridges (46) and valleys (48). The smaller turbulators may be concave surface features such as dimples (62) and grooves (54), and/or convex surface features such as bumps (58) and smaller ridges (52). An embodiment with convex turbulators (52, 58) in the valleys (48) and concave turbulators (54, 62) on the ridges (46) increases the cooling surface area, reduces boundary layer separation, avoids coolant shadowing and stagnation, and reduces component mass.
摘要:
In one embodiment, a method for detecting malicious software agents, such as domain-flux botnets. The method applies a co-clustering algorithm on a domain-name query failure graph, to generate a hierarchical grouping of hosts based on similarities between domain names queried by those hosts, and divides that hierarchical structure into candidate clusters based on percentages of failed queries having at least first- and second-level domain names in common, thereby identifying hosts having correlated queries as possibly being infected with malicious software agents. A linking algorithm is used to correlate the co-clustering results generated at different time periods to differentiate actual domain-flux bots from other domain-name failure anomalies by identifying candidate clusters that persist for relatively long periods of time. Persistent candidate clusters are analyzed to identify which clusters have malicious software agents, based on a freshness metric that characterizes whether the candidate clusters continually generate failed queries having new domain names.
摘要:
A turbine blade including an airfoil having a cavity defined between pressure and suction side walls, and first and second cooling circuits located within the cavity. The second cooling circuit includes a first upstream impingement cavity, a second upstream impingement cavity and a discharge impingement cavity. A plurality of pin fins are located within each of the impingement cavities, extending between the pressure and suction side walls to provide cooling to the pressure and suction side walls, and to restrict flow through the second cooling circuit and to direct an increased flow of cooling fluid into the first cooling circuit.
摘要:
Optical beam modulation is accomplished with the aid of a semiconductive nanomembrane, such as a silicon nanomembrane. A photocathode modulates a beam of charged particles that flow between the carbon nanotube emitter and the anode. A light source, or other source of electromagnetic radiation, supplies electromagnetic radiation that modulates the beam of charged particles. The beam of charged particles may be electrons, ions, or other charged particles. The electromagnetic radiation penetrates a silicon dioxide layer to reach the nanomembrane and varies the amount of available charge carriers within the nanomembrane, thereby changing the resistance of the nanomembrane. As the resistance of the nanomembrane changes, the amount of current flowing through the beam may also change.
摘要:
Disclosed is a ramp-platform device for an on-board relocatable small vehicle inspection system. The ramp-platform device includes a connection frame having a rectangular shape and defining therein an inner space, first and second intermediate parts which are disposed in parallel with each other and at two opposite sides of the connection frame, first to fourth ramp parts having a substantially triangle shaped longitudinal section. The first and second ramp parts are removably connected to the two opposite ends of the first intermediate part separately, and the third and fourth ramp parts are removably connected to the two opposite ends of the second intermediate part separately. The height of a top end of the first to the fourth ramp parts is substantially equal to the height of the first and second intermediate parts. When it is not in use, the ramp-platform device may be placed on the scanning vehicle of the moving device in a disassembling and folding conditions, and when it is under inspection, the vehicle to be inspected is raised to a predetermined height by assembling and spreading the ramp-platform device, so that a chassis and wheels of the small vehicle may be entered into the scanning range to achieve the inspection of each part of the small vehicle.
摘要:
Novel isolated DNA sequences which comprise all or part of a gene cluster encoding sanglifehrin synthase, processing and regulatory genes involved in the biosynthesis of a mixed non-ribosomal peptide/polyketide compound, or mutants having altered biosynthetic capability, polypeptides or mutants thereof encoded by DNA or the mutants, vectors containing the DNA or the mutants thereof, host cells transformed with the DNA, the mutants thereof, or the vector, and a method for producing sanglifehrin compounds. Compounds with cyclophilin inhibition activity used as immunosuppressants, antivirals or cardiac protection agents.
摘要:
A turbine vane for a gas turbine engine with an internal cooling system formed from a serpentine cooling channel with one or more flow blocking ribs is disclosed. The serpentine cooling channels may be configured to receive cooling fluids from internal cooling fluids supply channels. The serpentine cooling channels may include flow blocking ribs to form concurrent flow channels to reduce the cross-sectional area within the midchord region of the airfoil to maintain the internal through flow channel Mach number. The flow blocking ribs may include slots therein and may have any appropriate configuration. In at least one embodiment, the flow blocking ribs may be have a nonuniform taper or a uniformed taper.
摘要:
A composition of matter comprises a carbon-containing matrix. The carbon-containing matrix may comprise one or more carbon materials selected from the group comprising graphite crystalline carbon materials, carbon powder, carbon fibers, artificial graphite powder, and combinations thereof. In addition, the carbon-containing matrix comprises a plurality of pores. The composition of matter also comprises a reactive additive that is not a metal pressure disposed within at least a portion of the plurality of pores.
摘要:
The present invention discloses a mobile cantilever door-type container inspection system, in the art of radiation scanning imaging inspection technology. The system according to the present invention comprises a moveable scanning apparatus formed by a scanning frame and a remote control device, wherein the scanning frame comprises a radiation source and some detectors, wherein the radiation source or an apparatus cabin wherein the radiation source is disposed is connected with an L-shaped cantilever structure to form a door-type scanning frame, wherein beneath the radiation source or the apparatus cabin wherein the radiation source is disposed are provided with rollers that can reciprocatingly move on rails and are controlled by drive means. The detectors are disposed in a cross beam and a vertical beam of the cantilever structure of the door-type scanning frame. Rays of the radiation source are right in alignment with rows of detectors in the cantilever structure. The container truck to be inspected can pass through the door-like frame formed by the door-type scanning frame. Due to the cantilever structure, the inspection system is advantageous in stable operation, good-quality images, and high reliability.
摘要:
The present invention discloses a trailer system for inspecting a vehicle inspection, comprising: a trailer having a vehicle body, the trailer bearing a vehicle to be inspected; a turning plate mechanism rotatably provided on an upper surface of the trailer for abutting against wheels of the vehicle to be inspected halting on the trailer; and a turning plate rotation driving mechanism provided on the trailer for driving the turning plate to turn toward the upper surface of the trailer. The trailer system can trail vehicle with various loads passing through an inspection system such as a scanning passage, while bearing heavy load, maintaining the strength and rigidity thereof without damaging the vehicle to be inspected. In addition, the present invention further discloses a radiation imaging inspection system having the same.